Seiko Cal. 7121 - 543

Released in 1975, the Cal. 7121 with design code 543 was part of Seiko's domestic market collection. Powered by the 7121 caliber with 30j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-f441ade4e66c]

Also known as: Golden Tuna, Emperor

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1975

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